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3
votes
1answer
37 views

Removing wine stains from a decanter

I have a decanter which I use fairly often to pour out wines. I typically rinse it with hot water after the last wine has come out, but I cannot prevent it from forming 'residual' wine stains over ...
3
votes
1answer
63 views

Stripeless cleaning of windows

Cross post: http://physics.stackexchange.com/q/56800/7433 Last week I was discussing with a friend how we thought the stripeless cleaning of windows is achieved when using a cleaner like Windex ...
7
votes
1answer
138 views

What is the opposite of a surfactant?

Surfactants decrease surface tension between two fluids. What do you call a substance that increases the surface tension between two fluids? How is this effect acheived?
3
votes
1answer
40 views

How do surfactants spread in the case of multiple materials?

For example, consider a pot of water with a drop of oil floating on it, with surfactants present in the water. Will the surfactants in the water spread evenly across all three interfaces ...
0
votes
3answers
1k views

Reaction of soap with water

I've seen it many times... Why does soap becomes like a foam when it reacts with water (moisture) or when we touch it with wet hands.. What compound formed actually cause this physical change? And why ...